Hi there.
Do both... Run a 28hole front wheel and a 32 rear. The rear needs a few more spoke than the front typically.
As for rims, I'm a bit of a stuck record, but would suggest the Ambrosio Excellight.
You can save a load of weight on spoke choice as well. Dt revolution is fine on the front, and the rear you could use DT supercomp on the non drive side. Will save you around 75grams compared to standard double butted spokes.

I weigh a similar amount to you, and I have destroyed some lower spoke count wheels. Not sure what your weight saving on 4 spokes is, but it may be worth a few grams. Mavic CXP33 rims have proven to be amazingly robust in 32 spoke form. As have the Mavic Open Pro rims. Can't speak for them at lower spoke counts.

With King hubs you want a nice rim, (and cx-ray spokes)The Abrosio rim looks great, how about something like the H plus Son Archetype or the velocity A23??

I never have a problem with 28 spoke wheels- I am about a stone and a half lighter than you though so I am unsure. Ask the bike shop where you are buying the bits/getting the wheels built, they should have a lot of experience.